Which of these heat ranges should i run it-20 it22 i am running 2003 svt lightning with 6# pulley diablo sport chip k&n filter And are these the best type plug to run i heard they are the best for these ford lightnings i am sure they are other good plugs as well i realize they cost about $70.00 a set of 8 but nothing is to good when comes to my red lightning the best of everything drove it north today to fayettville 60 miles a camaro wanted to run well no use boring you with the details he was desposed of in quite a quick manner end of story

 

Take a look at our web site over at www.TroyerPerformance.com in both the Ignition (spark plugs) sections and in the Pulleys sections, and you'll see we provide a lot of specific information on what heat range of plugs to use in the Denso's. We also carry them & available for ordering right there online.

I run a 6 lb. lower and a 2 lb. upper, running 17 PSI boost, and I run the IT-20. Of course, my tuning is dead on the money, so I can run that hot a plug (which is 1 heat range colder than stock) and still drag race, etc.

I don't know what's going on in your chip's program, so to be safe, you could run the IT-22's, they are another heat range colder than the IT-20's, so at that point you are 2 full heat ranges colder than stock. That's *plenty* cold for the plugs.

Make sure to gap them very carefully, run the IT-22's at not more than .032 with the stock ignition.

Good luck!

 

Thanks mike'
And if i am not going to drag race i can run the twentys it20 is this correct and thanks so much mike for your advise your always correct. on preformance subjects i value your opinion thanks tom/